Which top prospects could be next up in the major leagues? Here's a look at Nos. 6-10:

6. Jon Gray, SP, Colorado (Previous rank – NR) – Gray has as much upside as any pitcher in baseball. Armed with a fastball that touches triple digits, a put-away slider, and an above-average changeup, Gray has the tools to be an ace. Command has held him back and, much like Gerrit Cole, his minor league performance has lagged compared to his overall potential. Nevertheless, with fellow prospect Eddie Butler sidelined, Gray is next in line if Colorado needs rotation help. If he can harness his stuff and refine his command, he can reach his No. 1 starter potential. However, even with his current command, he can be an effective big leaguer.

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7. Joc Pederson, OF, Los Angeles Dodgers (Previous rank – 8) – Pederson has cooled off a bit at Triple-A and his streakiness is starting to show, but he's still one of the best hitting prospects in the minors. The Dodgers over-priced, under-performing outfield continues to be a problem for LA and at some point the team will give Pederson a shot. Another injury to one of the big league starters would almost surely result in a promotion, as would a slide out of playoff contention. I'd like to see Pederson tone down his leg kick and make more consistent contact, but there's no doubting his 20-20 ability. Whether he hits .240 or .270 will depend on his ability to adjust his approach and shorten his swing against advanced pitching.

8. Kris Bryant, 3B, Chicago Cubs (Previous rank – 15) – The Cubs are typically cautious with prospects and the club has no hope of a playoff spot in 2014 so it would seem as though Bryant's chances of a promotion are dim. However, with a .359 average and 22 home runs through 65 games at Double-A, Bryant is forcing the issue. He'll need to cut down on his strikeouts to hit for average in the majors but his 40-HR potential means that he'll get the call sooner rather than later. Odds are he's in Chicago before the summer is out.

9. Dylan Bundy, SP, Baltimore (Previous rank – NR) – Bundy is currently working his way back from Tommy John surgery and has made progress in extended Spring Training. He'll need to prove himself in a minor league rehab assignment but it's not unrealistic to expect him in Baltimore sometime in July. Before his injury, Bundy had some of the most dominant stuff in the game. If he's healthy, he has the potential to be a No. 1 starter.

10. Kevin Plawecki, C, New York Mets Previous rank – NR) – With Travis d'Arnaud's demotion to Triple-A and his seeming inability to stay healthy, Plawecki is now edging himself into the picture. Plawecki is already a polished player on both sides of the ball and, if the Mets finally lose patience with d'Arnaud, he could quickly get the call. Plawecki has only moderate power but his balanced swing, all-fields approach, and excellent plate discipline mean that he should hit for a decent average even as a rookie. Long-term he should be able to hit .270 with 10-12 home runs over a full season.